<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>三段式布局</title>
		<link rel="stylesheet" type="text/css" href="../../assets/css/global.css" />
		<style type="text/css">
			.container {
				margin: 0 auto;
				width: 90%;
			}
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	<body>
		<div class="container">
			<header style="background: #ffaa7f; height: 150px;"></header>
			<main style="background: #ffaaff; height: 1000px;"></main>
			<footer style="background: #aaaaff; height: 100px;"></footer>
		</div>
	</body>
</html>
